import argparse
import subprocess

import torch


def parse_args():
    parser = argparse.ArgumentParser(description="Process a checkpoint to be published")
    parser.add_argument("in_file", help="input checkpoint filename")
    parser.add_argument("out_file", help="output checkpoint filename")
    args = parser.parse_args()
    return args


def process_checkpoint(in_file, out_file):
    checkpoint = torch.load(in_file, map_location="cpu")
    # remove optimizer for smaller file size
    if "optimizer" in checkpoint:
        del checkpoint["optimizer"]
    # if it is necessary to remove some sensitive data in checkpoint['meta'],
    # add the code here.
    torch.save(checkpoint, out_file)
    sha = subprocess.check_output(["sha256sum", out_file]).decode()
    if out_file.endswith(".pth"):
        out_file_name = out_file[:-4]
    else:
        out_file_name = out_file
    final_file = out_file_name + f"-{sha[:8]}.pth"
    subprocess.Popen(["mv", out_file, final_file])


def main():
    args = parse_args()
    process_checkpoint(args.in_file, args.out_file)


if __name__ == "__main__":
    main()
